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Disclosures of Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | $ 692,274 | $ 578,579
Impaired Loans Receivable [Abstract] |  |
Carrying amount of loans with a specific allowance |  | 3,665
Fair value of loans with a specific allowance |  | 3,053
Specific Allowance |  | 612
Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 692,274 | 578,579
Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 364 | 172
Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 690,943 | 575,859
Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 967 | 2,548
Fair Value, Measurements, Nonrecurring [Member] |  |
Impaired Loans Receivable [Abstract] |  |
Carrying amount of loans with a specific allowance | 19,481 |
Fair value of loans with a specific allowance | 16,437 |
Specific Allowance | 3,044 |
U.S. Treasury securities and obligations of U.S. government corporations & agencies |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 198,649 | 113,770
U.S. Treasury securities and obligations of U.S. government corporations & agencies | Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 198,649 | 113,770
U.S. Treasury securities and obligations of U.S. government corporations & agencies | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 0 | 0
U.S. Treasury securities and obligations of U.S. government corporations & agencies | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 198,649 | 113,770
U.S. Treasury securities and obligations of U.S. government corporations & agencies | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 0 | 0
Obligations of states and political subdivisions |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 192,579 | 166,266
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 0 | 0
Transfers into Level 3 | 967 | 0
Transfers out of Level 3 | 0 | 0
Total gains or losses [Abstract] |  |
Included in net income | 0 | 0
Included in other comprehensive income (loss) | 0 | 0
Purchases, issuances, sales and settlements [Abstract] |  |
Purchases | 0 | 0
Issuances | 0 | 0
Sales | 0 | 0
Settlements | 0 | 0
Ending balance | 967 | 0
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date | 0 | 0
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 192,579 | 166,266
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 0 | 0
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 191,612 | 166,266
Obligations of states and political subdivisions | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 967 | 0
Residential Mortgage Backed Securities [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 298,672 | 293,811
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 298,672 | 293,811
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 0 | 0
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 298,672 | 293,811
Residential Mortgage Backed Securities [Member] | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 0 | 0
Trust preferred securities |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities |  | 2,548
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward] |  |
Beginning balance | 2,548 | 1,652
Transfers into Level 3 | 0 | 0
Transfers out of Level 3 | 0 | 0
Total gains or losses [Abstract] |  |
Included in net income | 0 | 0
Included in other comprehensive income (loss) | 18 | 1,053
Purchases, issuances, sales and settlements [Abstract] |  |
Purchases | 0 | 0
Issuances | 0 | 0
Sales | (2,522) | 0
Settlements | (44) | (157)
Ending balance | 0 | 2,548
Total gains or losses for the period included in net income attributable to the change in unrealized gains or losses related to assets and liabilities still held at the reporting date | 0 | 0
Trust preferred securities | Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities |  | 2,548
Trust preferred securities | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities |  | 0
Trust preferred securities | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities |  | 0
Trust preferred securities | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities |  | 2,548
Other securities |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 2,374 | 2,184
Other securities | Fair Value, Measurements, Recurring [Member] |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 2,374 | 2,184
Other securities | Fair Value, Measurements, Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 364 | 172
Other securities | Fair Value, Measurements, Recurring [Member] | Significant Other Observable Inputs (Level 2) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | 2,010 | 2,012
Other securities | Fair Value, Measurements, Recurring [Member] | Significant Unobservable Inputs (Level 3) |  |
Available-for-sale: [Abstract] |  |
Total available-for-sale securities | $ 0 | $ 0

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